#signaler__signaller  someone who communicates by signals
  supertype:  #communicator  a person who communicates with others
  subtype:  #signalman  a railroad employee in charge of signals and point in a railroad yard
  subtype:  #toller__bell_ringer__bellringer__ringer  a person who rings church bells (as for summoning the congregation)
  subtype:  #whistler  makes a loud high sound

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